If software renderer is not used, don't use it to set bounds

Author: Promises

src/main/java/org/runejs/client/frame/ScreenController.java

@@ -83,7 +83,7 @@ public static void refreshFrameSize() {
     }
 
     public static void setBounds() {
-        if (Game.gameCanvas == null) {
+        if (Game.gameCanvas == null || Game.signlink.gameShell == null) {
             return;
         }
         Dimension innerSize = getInnerSize(GameShell.clientFrame);